Situation: I am using Linux Mint 18.2 Cinammon 64bit with Virtualbox installed. Within Virtualbox, I have a single virtual machine (VM) - Windows 7 64bit - with four snapshots (each a uniquely configured environment for a specific purpose, eg.photoshop, software testing).
For a half of year everything was running perfectly. Yesterday, I booted the PC after two days of down time, and every time I start any VM snapshot, both Virtualbox and the host system (Linux Mint) absolutely freeze (ie. the mouse and keyboard are unresponsive).
I've since reinstalled Virtualbox, and have checked that my Linux system has all updates installed.
Question: in your opinion, what steps should be taken (basic or more advanced), to investigate such a fault and to determine the cause(-s)? Which logs to check first, what tool to use for diagnosis?
Update For those, who have same problem. I was installing Virtualbox using Linux Mint Software Manager. Software Manager installs VirtualBox v5.0, which is outdated. After downloading directly from virtualbox website and installing latest Virtualbox (v5.2), described problem dissapeared.